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| Why is there lava? ||{{w|Lava}} is magma (molten rock) which is at the Earth's surface. Magma in the Earth comes from the melting of rock due to rising heat from deeper within the planet. {{w|Earth's internal heat budget|This heat}} is about half radiogenic and half primordial (left over from the formation and differentiation of the Earth). Most of the crust and mantle of the Earth is solid rock, but in places (usually controlled by plate tectonics, but {{w|Hawaii hotspot|not always}}) where the heat is high enough the minerals with lowest melting point start to melt and then migrate upwards towards the surface. This melt collects in {{w|Magma chamber|magma chambers}}, in which the magma may start to cool and crystallize. Sometimes it will crystallize completely, becoming an underground solid body called a pluton. Other times melt will keep migrating upwards until it reaches the surface and erupts as lava, forming a {{w|volcano}} or undersea vent.
 
| Why is there lava? ||{{w|Lava}} is magma (molten rock) which is at the Earth's surface. Magma in the Earth comes from the melting of rock due to rising heat from deeper within the planet. {{w|Earth's internal heat budget|This heat}} is about half radiogenic and half primordial (left over from the formation and differentiation of the Earth). Most of the crust and mantle of the Earth is solid rock, but in places (usually controlled by plate tectonics, but {{w|Hawaii hotspot|not always}}) where the heat is high enough the minerals with lowest melting point start to melt and then migrate upwards towards the surface. This melt collects in {{w|Magma chamber|magma chambers}}, in which the magma may start to cool and crystallize. Sometimes it will crystallize completely, becoming an underground solid body called a pluton. Other times melt will keep migrating upwards until it reaches the surface and erupts as lava, forming a {{w|volcano}} or undersea vent.
 
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| Why is YKK on all zippers? || {{w|YKK}} Group is the name of a large group of Japanese manufacturing companies, which among other things manufacture a lot of zippers. YKK zippers are also considered to be some of the best available, so a clothing maker including a YKK zipper would likely leave the YKK name on, instead of getting no branding or rebranding them.
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| Why is YKK on a zippers? || {{w|YKK}} Group is the name of a large group of Japanese manufacturing companies, which among other things manufacture a lot of zippers. YKK zippers are also considered to be some of the best available, so a clothing maker including a YKK zipper would likely leave the YKK name on, instead of getting no branding or rebranding them.
 
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| Why is life so boring? ||It is up to an individual to find meaning and interest in life. Monotony, predictability, and lack of physical and intellectual stimulation would lead to a feeling of boredom.  
 
| Why is life so boring? ||It is up to an individual to find meaning and interest in life. Monotony, predictability, and lack of physical and intellectual stimulation would lead to a feeling of boredom.  

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